Thermostat back plate



FIG. 1 is a perspective view of a thermostat back plate showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines of even length illustrate portions of the thermostat back plate that form no part of the claimed design. 

CLAIM The ornamental design for a thermostat back plate, as shown and described. 